WO2019225520A1

WO2019225520A1 - Connector with backlash preventing function

Info

Publication number: WO2019225520A1
Application number: PCT/JP2019/019804
Authority: WO
Inventors: 森　浩一; 優梨香清水; 元気渡辺
Original assignee: 株式会社ニチリン
Priority date: 2018-05-21
Filing date: 2019-05-17
Publication date: 2019-11-28
Also published as: JP6566411B1; JP2019203599A

Abstract

A connector (100) connects to a pipe (50) provided with a spool part (50a) (annular protrusion) on an end section outer periphery, the connector comprising a connector body (1), a checker (2), and a retainer (3). The checker (2) includes: a pressing section (7); and a projecting section (10) which is formed on the rear surface of the pressing section (7) and in which a side surface (10a) thereof at the tip end on a spool part (50a)-side is an inclined surface. The checker (2) is pushed into an insertion completion position from a temporary stop position, thereby causing the projecting section (10) to fit into the rear side of the spool part (50a), and to press the corner of the spool part (50a) with the inclined surface.

Description

Connector with rattling prevention function

The present invention relates to a connector that is used for connecting a pipe such as a fuel pipe and has a check function for confirming whether or not the pipe is completely connected.

For example, there are connectors described in

Patent Documents

1 and 2 as connectors having the check function described above. The connector described in Patent Document 1 is a pipe insertion hole which is an elastic restoring force when the retainer expanded by the spool portion (annular convex portion) of the pipe returns to its original shape and is opposite to the pipe insertion direction. The retainer is configured to slide to the side, and by pushing the retainer, the checker can be pushed into the connector main body from the temporarily fixed position to the insertion completion position.

The connector described in Patent Document 2 is an improvement of the connector described in Patent Document 1, and in order to make it difficult for movement of the retainer to move toward the pipe insertion hole, With the lower end locked to the bottom of the side as a fulcrum, the retainer is tilted to the pipe insertion hole side instead of sliding.

JP 2015-48898 A Japanese Patent No. 5885372

Although not shown in

Patent Documents

1 and 2, a seal member such as an O-ring is provided in the pipe insertion portion of the connector body. On the other hand, pressure fluctuations may occur in the fluid flowing in the pipe connected to the connector.

Here, when the backlash of the pipe in the axial direction is large, the pipe moves in the axial direction when the fluid pressure fluctuation occurs, for example, the pipe slides with respect to the O-ring, and the pipe and the O-ring There is a concern that the internal fluid gradually leaks from the beginning.

In the connectors described in

Patent Documents

1 and 2, whether or not the movement of the pipe in the axial direction can be regulated depends on whether the retainer slides or tilts toward the pipe insertion hole side in the axial direction between the connector body and the retainer. This is determined by the relationship between the distance and the width of the spool portion of the pipe.
If the difference between the distance and the width is reduced, the movement of the pipe in the axial direction can be restricted. However, if the difference is made too small, when the pipe is inserted into the connector body due to manufacturing tolerances. Furthermore, the positional relationship after the slide movement or tilting of the retainer shifts, resulting in a connector that cannot completely connect the pipe.

The present invention has been made in view of the above circumstances, and its object is to provide a structure capable of suppressing the movement of the pipe in the axial direction when a pressure fluctuation or the like occurs in the fluid flowing inside. To provide a connector.

The present invention relates to a connector connected to a pipe having an annular protrusion on the outer periphery of the end, a connector main body having a pipe insertion hole into which the pipe is inserted, and a temporary fixing to the connector main body A checker that is pushed into the connector main body from the position to the insertion completion position with respect to the connector main body, and is placed inside the connector main body, and before the pipe is inserted into the connector main body, the insertion from the temporary fixing position And a retainer for restricting the movement of the checker to the completion position. The checker includes a pressing portion and a projecting portion formed on a back surface of the pressing portion and having a side surface at a tip end on the annular convex portion side as an inclined surface. The retainer is formed to tilt or slide toward the pipe insertion hole side opposite to the pipe insertion direction when the pipe is inserted from the pipe insertion hole into the connector body. ing. When the retainer tilts or slides toward the pipe insertion hole, the checker can be pushed into the connector main body from the temporary fixing position to the insertion completion position. When the checker is pushed from the temporarily fixed position to the insertion completion position, the protruding portion is fitted to the rear side of the annular convex portion, and the corner portion of the annular convex portion is pressed by the inclined surface. It will be in the state.

According to the present invention, when the checker is pushed from the temporary fixing position to the insertion completion position, the projecting portion formed on the back surface of the pressing portion of the checker functions as a so-called wedge, and as a result, The protruding portion can suppress the movement of the pipe in the axial direction.

It is a perspective view of the connector concerning one embodiment of the present invention. It is a single-piece figure of the connector main body shown in FIG. It is a single-piece figure of the checker shown in FIG. It is a single-piece figure of the retainer shown in FIG. FIG. 3 is a side (cross-sectional) view showing each state when a pipe is connected to the connector shown in FIG. 1. 6 is an enlarged view of FIG. 5C (note that an O-ring and an annular spacer not shown in FIG. 5C and the like are also shown). FIG. 8 is a plan view (not shown of the checker) showing each state when the pipe is connected to the connector shown in FIG. 1 (note that a part of the checker is shown in the CC cross-sectional view of FIG. Shown). It is a figure which shows the connector main body in the case of making a retainer slide. It is explanatory drawing explaining the rotation prevention mechanism which restrict | limits that a pipe rotates.

Hereinafter, modes for carrying out the present invention will be described with reference to the drawings.

(Connector configuration)
As shown in FIG. 1, a connector 100 according to an embodiment of the present invention includes a connector main body 1, a checker 2, and a retainer 3. This connector 100 is a pipe joint used for pipe connection of fuel pipes.

<Connector body>
The connector main body 1 will be described mainly with reference to FIGS. The connector main body 1 is a main part of the connector 100 and includes a pipe insertion portion 4 having a retainer accommodating portion 6 formed at an end thereof, and a hose connection portion 5 extending from the pipe insertion portion 4. The connector main body 1 of this embodiment is L-shaped. In other words, the axial direction of the pipe insertion portion 4 and the axial direction of the hose connection portion 5 are orthogonal to each other. In addition, the relationship between the axial direction of the pipe insertion part 4 and the axial direction of the hose connection part 5 is not limited to orthogonal, for example, the pipe insertion part 4 and the hose connection part 5 are arranged on one axis. Also good. The material of the connector body 1 is, for example, resin.

The retainer accommodating portion 6 has a hollow, rounded rectangular parallelepiped shape. A pipe insertion hole 1a into which the pipe 50 is inserted is provided on the front surface thereof, and an upper end portion of the retainer accommodating portion 6 is a rectangular opening 6e in plan view. It is said that. The opening 6e is provided with a protrusion 6a that protrudes from the inner wall surface of the upper end portion toward the insertion direction of the pipe 50. In addition, a locked hole 6d as a retainer locked portion is formed in the bottom portion of the retainer accommodating portion 6 (the bottom portion on the pipe insertion hole 1a side in the connector main body 1).

The locked hole 6d is a hole into which a retainer locking portion 13 provided at a lower end portion of the retainer 3 described later is fitted. In order to give a little play so that the retainer 3 can easily tilt, the locked hole 6d is not a perfect circle but a short long hole. The locked hole 6d may be a perfect circle instead of a long hole.

As shown in FIG. 6, the inner surface 1 b of the bottom corner portion of the pipe insertion portion 4 on the retainer accommodating portion 6 side is processed into an R surface, and when the pipe 50 is inserted into the connector body 1, the spool portion 50 a hits. (See FIG. 5B). When the checker 2 is pushed from the temporary fixing position to the insertion completion position, the inner surface 1b of the bottom corner portion does not interfere with a later-described protruding portion 10 of the checker 2 without interfering with the spool portion 50a of the pipe 50. This is for adjusting the position of the spool portion 50a when the pipe 50 is inserted so as to be securely fitted to the side.

In addition, on the back surface of the retainer accommodating portion 6, a pair of left and right checker locked portions 6 b and a pair of left and right checker covers are respectively provided on the upper side of the cylindrical pipe insertion portion 4 and slightly below the upper side. A locking portion 6c is provided. These checker locked

portions

6b and 6c are portions where locking claws 9a (see FIG. 3) of the checker 2 described later are locked.

A fluid path 5 a is provided inside the hose connection portion 5, and a hose (not shown) is extrapolated to the hose connection portion 5.

<Checker>
The checker 2 will be described mainly with reference to FIGS. The checker 2 is a part having a role of confirming from the outside whether or not the pipe 50 is completely connected to the connector body 1, and the insertion into the connector body 1 is completed from the temporarily fixed position with respect to the connector body 1. The connector body 1 is pushed to the position.

The checker 2 includes a rectangular pressing portion 7 that is pressed by a person's finger, a locking leg portion 9 to the connector body 1 that is formed to extend downward from the left and right ends of the pressing portion 7, Similarly to the stop leg portion 9, a retainer holding piece portion 8 formed to extend downward from the left and right end portions of the pressing portion 7 is provided. The material of the checker 2 is, for example, resin.

The front end of the locking leg portion 9 is a locking claw 9 a that is a hooked portion to the checker locked

portions

6 b and 6 c provided on the connector body 1. A retainer holding portion 8a that holds a main body portion 11 of the retainer 3 to be described later from both sides is formed from the tip of the retainer holding piece portion 8 to the center portion. Specifically, the shape of the opposing surface of the opposing retainer holding portion 8 a is matched to the outer shape of the main body portion 11 of the retainer 3. In other words, the opposing surface of the retainer holding portion 8 a is a curved surface that comes into contact with the outer surface of the main body portion 11 of the retainer 3.

As shown in FIGS. 3, 5, and 6, the back surface of the pressing portion 7 is fitted to the back side of the spool portion 50 a of the pipe 50 by pushing the checker 2 from the temporary fixing position to the insertion completion position. A protruding portion 10 is formed. In the projecting portion 10, the side surface 10a at the tip of the pipe 50 on the spool portion 50a side is inclined. Further, the lower surface 10 b at the tip of the protruding portion 10 has an arc shape along the outer peripheral surface of the pipe 50. When the protruding portion 10 is fitted on the rear side of the spool portion 50a, a gap is formed between the lower surface 10b and the outer peripheral surface of the pipe 50.

<Retainer>
The retainer 3 will be described with reference to FIGS. The retainer 3 is disposed inside the retainer accommodating portion 6 of the connector main body 1 (see FIG. 1 and the like), and the insertion is completed from the temporarily fixed position of the checker 2 to the connector main body 1 before the pipe 50 is inserted into the connector main body 1. It is a part that restricts the movement of the checker 2 to the position.

The retainer 3 includes a C-shaped main body 11 that elastically deforms and expands when the pipe 50 is inserted, and a pair of legs that extend upward (outside) from the end of the notch-shaped portion of the main body 11. Part 12. The material of the retainer 3 is, for example, resin or metal.

As described above, the C-shaped main body 11 is formed to be elastically deformed. On the inner side surfaces (inner portions) of the main body portion 11 facing each other, mountain-shaped portions 11a are provided so as to protrude slightly in the central direction. In addition, a retainer locking portion 13 that protrudes downward (outward) and whose tip is an enlarged diameter portion is provided at the center of the outer bottom surface of the main body portion 11. Moreover, the retainer 3 is made into the shape of left-right symmetry and front-back symmetry.

(Movement of each part of the connector when connecting a pipe to the connector)
Mainly, the movement of each component of the connector 100 when the pipe 50 is connected to the connector 100 will be described with reference to FIGS. As a premise, a spool portion 50a (annular convex portion) is provided on the outer periphery of the end portion of the pipe 50 connected to the connector 100.

<Before inserting pipe>
Before the pipe 50 is inserted into the connector main body 1, the checker 2 is temporarily fixed to the connector main body 1 in a state of protruding upward from the retainer accommodating portion 6 of the connector main body 1 as shown in FIG. Has been. The locking claw 9a at the tip of the locking leg 9 of the checker 2 is hooked on the checker locked portion 6b provided on the connector body 1 (see FIG. 1), and at the temporary fixing position shown in FIG. 2 is locked to the connector body 1.

The temporary fixing of the checker 2 will be described. When the pair of left and right retainer holding pieces 8 of the checker 2 are inserted into the retainer receiving portion 6 of the connector main body 1 from above, the pair of left and right locking legs 9 of the checker 2 located behind the checker 2 hits the connector main body 1. It spreads outward (elastically deformed), and then the locking claw 9 a is fitted into the checker locked portion 6 b provided in the connector main body 1. As a result, the checker 2 cannot be easily detached from the connector body 1.

In the retainer 3, the retainer locking portion 13 at the lower end thereof is fitted in a locked hole 6 d formed in the bottom of the retainer receiving portion 6, and is held on the inclined surface 6 f of the retainer receiving portion 6. It has become. A protrusion 6 a provided in the retainer housing portion 6 is positioned on the near side (the pipe insertion hole 1 a side) immediately adjacent to the two leg portions 12 of the retainer 3. The protrusion 6a prevents the retainer 3 from tilting toward the pipe insertion hole 1a.

At this time, since the protruding portion 10 of the checker 2 is positioned above the two legs 12 of the retainer 3, even if the checker 2 is pushed into the connector main body 1, The lower surface 10b of the projecting portion 10 hits the upper ends of the two leg portions 12 of the retainer 3, and the checker 2 cannot be pushed into the connector body 1 any more (see FIG. 5A).

In addition, the retainer 3 in the retainer accommodating portion 6 shown in FIG. 1 shows a state after the pipe 50 (not shown) is inserted into the connector main body 1 (the state after tilting).

<Pipe insertion>
The pipe 50 is inserted into the connector body 1 from the pipe insertion hole 1a. As the pipe 50 is inserted, the spool portion 50a of the pipe 50 comes into contact with the curved surface on the pipe insertion hole 1a side of the mountain-shaped portion 11a of the main body portion 11 of the retainer 3. Thereafter, when the pipe 50 is further inserted, the spool portion 50a pushes and expands the mountain-shaped portion 11a, so that the main body portion 11 is expanded. As a result, the two legs 12 of the retainer 3 are also expanded, and the tilt restriction of the retainer 3 toward the pipe insertion hole 1a by the protrusion 6a provided in the retainer accommodating portion 6 is released (see FIG. 7B). .

As the pipe 50 is further inserted, the spool portion 50a of the pipe 50 exceeds the top of the mountain-shaped portion 11a of the main body portion 11 of the retainer 3, and the curved surface on the opposite side of the mountain-shaped portion 11a is pushed by the spool portion 50a. The retainer 3 is repelled by the elastic restoring force of the main body 11 of the retainer 3, and the retainer 3 moves toward the pipe insertion hole 1 a that is opposite to the insertion direction of the pipe 50, with the retainer locking portion 13 as a fulcrum. Tilt (see FIG. 5B). Thereby, the leg part 12 of the retainer 3 remove | deviates from the downward space of the protrusion part 10 of the checker 2. FIG.

At this time, the lower corner portion of the spool portion 50 a of the pipe 50 hits the inner surface 1 b of the bottom corner portion of the pipe insertion portion 4, and the pipe 50 is not pushed further into the pipe insertion portion 4. As a result, the spool portion 50a of the pipe 50 is stopped before the projecting portion 10 of the checker 2 (see FIG. 5B). Thus, the checker 2 can be pushed into the connector body 1.

Then, the checker 2 is pushed into the connector body 1 by pushing the pressing portion 7 of the checker 2 with a finger. When the checker 2 is pushed in, as shown in FIG. 5C, the protruding portion 10 of the checker 2 is fitted into the rear side of the spool portion 50a of the pipe 50, and the corner portion (upper corner portion of the spool portion 50a is fitted). ) Is pressed by the side surface 10 a (inclined surface) of the protruding portion 10. As a result, the pipe 50 moves slightly toward the pipe insertion hole 1 a side, with the spool portion 50 a being pushed by the side surface 10 a (inclined surface) of the protruding portion 10. And the spool part 50a of the pipe 50 will be in the state partially fitted between the curved surfaces which comprise the mountain-shaped part 11a which the retainer 3 opposes (refer FIG. 6). Note that the lower corner portion of the spool portion 50 a of the pipe 50 is slightly separated from the inner surface 1 b of the bottom corner portion of the pipe insertion portion 4.

When the protruding portion 10 of the checker 2 is fitted on the rear side of the spool portion 50a of the pipe 50, the protruding portion 10 functions as a so-called wedge, and the spool portion 50a of the pipe 50 has an axial direction. Thus, the pipe 3 is strongly pressed against the retainer 3, and the pipe 50 does not move in the axial direction. In the present embodiment, since a gap is formed between the lower surface 10b of the protruding portion 10 and the outer peripheral surface of the pipe 50, the side surface 10a (inclined surface) of the protruding portion 10 is extended to the corner portion of the spool portion 50a. The acting force acts on the corner portion of the spool portion 50a without waste. Further, as can be seen from the front view of the retainer 3 shown in FIG. 3, the lower surface 10 b of the projecting portion 10 has an arc shape along the outer peripheral surface of the pipe 50, thereby pushing the spool portion 50 a. 10 can increase the area of the side surface 10a (inclined surface), and as a result, the protruding portion 10 can reliably (stablely) push the spool portion 50a without shaking.

In addition to the above, when the spool portion 50a of the pipe 50 is partially fitted between the curved surfaces constituting the opposed mountain-shaped portions 11a of the retainer 3, the pipe 50 is perpendicular to the axial direction of the pipe 50. In all directions, the movement of the pipe 50 can be suppressed.

When the checker 2 is pushed into the connector body 1, the locking claws 9 a at the tips of the pair of left and right locking legs 9 of the checker 2 are fitted into the locked portions 6 c provided on the connector body 1. Thus, the checker 2 is locked to the connector main body 1. The position of the checker 2 with respect to the connector body 1 at this time is the insertion completion position of the checker 2 with respect to the connector body 1.

Here, when the checker 2 is pushed from the temporary fixing position to the insertion completion position, the pipe 50 is sandwiched from both sides by the retainer holding portion 8a of the retainer holding piece portion 8 through the main body portion 11 of the retainer 3. (See the CC cross-sectional view in FIG. 7C). Thereby, the movement restriction | limiting of the pipe 50 in all the directions (especially the width direction of the checker 2) perpendicular | vertical to the axial direction of the pipe 50 becomes more reliable.

As illustrated in FIG. 6, an O-ring 15 (seal member) and an annular spacer 16 are inserted into the pipe insertion portion 4 of the connector body 1 so that fuel (fluid) flowing inside the pipe does not leak. ing. According to the connector 100 of the present embodiment, even if a pressure fluctuation occurs in the fluid flowing inside the pipe, the pipe 50 does not move in the axial direction, and therefore the sliding of the pipe 50 with respect to the O-ring 15 does not occur. The fluid (fuel) can be prevented from leaking from between the pipe 50 and the O-ring 15.

Further, the connector 100 of the present embodiment is used, for example, for connecting a fuel pipe of an automobile. That is, the connector 100 may be mounted on the automobile together with the pipe 50. In this case, a phase shift may occur between the connector main body 1 and the pipe 50 due to the vibration of the vehicle body of the automobile, and there is a backlash in the direction perpendicular to the axial direction (the connector main body 1 and / or the pipe). If the vibration of 50) is large, the internal fluid may leak from between the pipe 50 and the O-ring 15. However, since the connector 100 according to the present embodiment has a structure that can suppress backlash of the pipe 50 in all directions perpendicular to the axial direction, the fluid caused by backlash in the direction perpendicular to the axial direction can be prevented. Leakage can also be effectively prevented.

(Action / Effect)
According to the connector 100 of the present embodiment, the protruding portion 10 (the side surface 10a of the spool portion 50a is an inclined surface) that fits behind the spool portion 50a of the pipe 50 is formed on the back surface of the pressing portion 7 of the checker 2. Therefore, the protruding portion 10 functions like a so-called wedge, and the protruding portion 10 can suppress the movement of the pipe in the axial direction. As a result, fluid leakage from the connector due to the axial movement of the pipe 50 can be prevented.

Further, since the lower surface 10b of the projecting portion 10 has an arc shape along the outer peripheral surface of the pipe 50, the area of the side surface 10a (inclined surface) of the projecting portion 10 that pushes the spool portion 50a is increased. As a result, the projecting portion 10 can push the spool portion 50a reliably (stable) without shaking.

Further, when the protruding portion 10 is fitted to the rear side of the spool portion 50a, a gap is formed between the lower surface 10b of the protruding portion 10 and the outer peripheral surface of the pipe 50. Thus, the force acting on the corner portion of the spool portion 50a from the side surface 10a (inclined surface) of the projecting portion 10 acts on the corner portion of the spool portion 50a without waste, and on the side surface 10a (inclined surface) of the projecting portion 10. The spool portion 50a can be pushed reliably.

In addition, since the spool portion 50a of the pipe 50 is partially fitted between the curved surfaces constituting the opposed mountain-shaped portions 11a of the main body portion 11 of the retainer 3, the pipe 50 is axially moved. The movement of the pipe 50 can also be suppressed in all vertical directions. As a result, fluid leakage due to backlash in the direction perpendicular to the axial direction can be effectively prevented.

Furthermore, when the checker 2 is pushed from the temporary fixing position to the insertion completion position, the pipe 50 is sandwiched from both sides by the retainer holding portion 8a of the retainer holding piece portion 8 through the main body portion 11 of the retainer 3. It becomes a state. Thereby, the movement restriction | limiting of the pipe 50 in all the directions (especially the width direction of the checker 2) perpendicular | vertical to the axial direction of the pipe 50 becomes more reliable.

(Modification)
The above embodiment can be modified as follows.
The inner surface 1b of the bottom corner portion of the pipe insertion portion 4 that presses the spool portion 50a when the pipe 50 is inserted into the connector main body 1 may not be provided.

The lower surface 10 b of the projecting portion 10 formed on the back surface of the pressing portion 7 of the checker 2 may not have an arc shape along the outer peripheral surface of the pipe 50. For example, it may be changed from an arc shape (see FIG. 3) to a planar shape as shown in FIG. 9, like a lower surface 10 c of the protruding portion 10 formed on the back surface of the pressing portion 7 of the checker 2. Then, on the rear side of the spool portion 50a (annular convex portion) of the pipe 50 (that is, the back side of the paper surface with respect to the spool portion 50a) so as to correspond to the lower surface 10c of the protruding portion 10, the outer periphery of the pipe 50 A D-cut portion 50b is formed in which a part of the surface in the circumferential direction is cut out in a planar shape. As a result, when the protruding portion 10 is fitted to the rear side of the spool portion 50a, the planar lower surface 10c of the protruding portion 10 and the D-cut portion 50b cut out in a planar shape have a predetermined gap. Configured to confront each other. Therefore, it is possible not only to suppress the movement of the pipe 50 in the axial direction without causing any trouble in the operation in which the protruding portion 10 functions like a wedge, but also with respect to the connector main body 1. The rotation prevention mechanism A that restricts the pipe 50 from turning can also be configured (the pipe 50 is restricted from turning relative to the connector body 1). In the checker 2 shown in FIG. 9, the same parts as those of the checker 2 shown in FIG. 3 are denoted by the same reference numerals as those of the checker 2 shown in FIG.

Further, a notch (not shown) is provided on the tip surface of the pipe 50 inserted from the pipe insertion hole 1a, and when the protruding portion 10 is fitted on the rear side of the spool 50a, the notch is formed in the notch. An anti-rotation mechanism B that restricts the pipe 50 from rotating with respect to the connector main body 1 by providing a protrusion (not shown) to be fitted, for example, on the inner surface of the rear side of the pipe insertion portion 4. It can also be configured. Even when the anti-rotation mechanism B is employed, naturally, the protruding portion 10 can suppress the movement of the pipe 50 in the axial direction without causing any trouble in the operation of a so-called wedge. is there.

When the protruding portion 10 is fitted on the rear side of the spool portion 50a, the lower surface 10b of the protruding portion 10 and the outer peripheral surface of the pipe 50 may slightly contact each other.

In relation to the structure for tilting the retainer 3, a hook-shaped retainer locking portion is used instead of the retainer locking portion 13 whose tip is an enlarged diameter portion as in this embodiment, and the retainer locked portion. In regard to the above, the hook-shaped retainer locking portion may be a rod-shaped retainer locked portion to be locked.

In the above embodiment, the retainer 3 tilts toward the pipe insertion hole 1a. Instead of this, a structure in which the retainer 3 slides toward the pipe insertion hole 1a may be employed. FIG. 8 is a view showing the connector main body 1 when the retainer 3 is slid. In this case, instead of the locked hole 6d shown in FIG. 2 or the like, a long hole 6g (a long hole longer than the locked hole 6d) is formed in the bottom of the retainer accommodating portion 6. When the pipe 50 is inserted into the connector body 1 from the pipe insertion hole 1a, the retainer 3 slides toward the pipe insertion hole 1a along the long hole 6g. In addition, in the connector main body 1 shown in FIG. 8, the same part as the connector main body 1 shown in FIG. 2 is attached | subjected with the same code | symbol as the connector main body 1 shown in FIG.

The connector 100 according to the above embodiment is a pipe joint used for pipe connection of fuel pipes. The connector of the present invention may be a pipe joint used for connecting a pipe (for example, a car air conditioner pipe) through which a refrigerant (gas-liquid mixed fluid) flows. In this case, for example, a groove in which the O-ring 15 is mounted is provided on the outer peripheral surface of the pipe, and the O-ring 15 is mounted in this groove. That is, the connector of the present invention can be applied to a pipe having an O-ring 15 having a spool portion 50a attached to the outer peripheral surface. The connector of the present invention is not limited to pipe joints used for fuel pipe connection or refrigerant pipe connection, and the connector of the present invention is applied to pipe connections for various uses. be able to.

(Other detent mechanism)
The anti-rotation mechanism that restricts the pipe 50 from rotating with respect to the connector body 1 is not limited to the anti-rotation mechanism A and the anti-rotation mechanism B described above. For example, the following two configurations are also conceivable.

<Non-rotating mechanism C>
A second spool portion (annular convex portion, not shown) is provided on the front side of the spool portion 50a of the pipe 50 (that is, the front side of the drawing with respect to the spool portion 50a). Further, a convex portion (not shown) protruding radially outward from the outer peripheral surface of the second spool portion is provided. Then, when the protruding portion 10 is fitted on the rear side of the spool portion 50a, a concave portion (not shown) into which the convex portion is fitted is provided, for example, on the inner surface of the pipe insertion hole 1a of the retainer housing portion 6. Accordingly, the rotation prevention mechanism C that restricts the pipe 50 from rotating with respect to the connector main body 1 can be configured.

<Non-rotating mechanism D>
The anti-rotation mechanism can be configured with a configuration opposite to that of the anti-rotation mechanism C described above. That is, instead of the convex portion of the second spool portion, a concave portion (not shown) that is recessed radially inward from the outer peripheral surface of the second spool portion is provided. Then, when the protruding portion 10 is fitted on the rear side of the spool portion 50a, a convex portion (not shown) that fits into the concave portion is provided, for example, on the inner surface of the pipe insertion hole 1a of the retainer accommodating portion 6. Accordingly, it is possible to configure the rotation preventing mechanism D that restricts the pipe 50 from rotating with respect to the connector main body 1.

Even when the above-described anti-rotation mechanism C or anti-rotation mechanism D is adopted, naturally, the protruding portion 10 does not interfere with the operation of a so-called wedge, and does not interfere with the operation of the pipe 50 in the axial direction. It is possible to suppress movement, respectively. Further, in the connector 100, any one of the above-described anti-rotation mechanisms A to D is additionally configured, so that the movement of the pipe 50 in the axial direction can be suppressed and the rotation of the pipe 50 can be restricted. Therefore, the layout of the pipe 50 connected to the connector 100 is stabilized. For example, this is more preferable in the case of being used for pipe connection of a fuel pipe of an automobile.

Of course, various changes can be made within the scope of those skilled in the art.

1: Connector main body 1a: Pipe insertion hole 1b: Support surface 2: Checker 3: Retainer 7: Pressing portion 8: Retainer holding piece 10: Projecting portion 10a: Side surface (inclined surface)
10b, 10c: Lower surface 11: Main body portion 11a: Mountain shape portion 50: Pipe 50a: Spool portion (annular convex portion)
50b: D cut part 100: Connector

Claims

A connector connected to a pipe provided with an annular protrusion on the outer periphery of the end,
A connector body having a pipe insertion hole into which the pipe is inserted;
A checker that is pushed into the connector main body from the temporary fixing position to the connector main body to the insertion completion position with respect to the connector main body,
A retainer that is disposed inside the connector body and restricts the movement of the checker from the temporarily fixed position to the insertion completion position before the pipe is inserted into the connector body;
With
The checker is
A pressing part;
A projecting portion formed on the back surface of the pressing portion, the side surface of the tip of the annular convex portion being an inclined surface;
Have
The retainer is formed to tilt or slide toward the pipe insertion hole side opposite to the pipe insertion direction when the pipe is inserted from the pipe insertion hole into the connector body. And
By allowing the retainer to tilt or slide to the pipe insertion hole side, the checker can be pushed into the connector main body from the temporary fixing position to the insertion completion position.
When the checker is pushed from the temporarily fixed position to the insertion completion position, the protruding portion is fitted to the rear side of the annular convex portion, and the corner portion of the annular convex portion is pressed by the inclined surface. A connector, characterized by being in a finished state.
The connector according to claim 1,
The lower surface of the tip of the projecting portion has an arc shape along the outer peripheral surface of the pipe,
The connector is characterized in that a gap is formed between the lower surface of the protruding portion and the outer peripheral surface of the pipe when the protruding portion is fitted to the rear side of the annular convex portion.
The connector according to claim 1 or 2,
The retainer has a C-shaped main body that elastically deforms and expands when the pipe is inserted,
The inner portions of the main body portion facing each other are mountain-shaped portions protruding in the center direction,
When the pipe is inserted into the connector main body from the pipe insertion hole, the main body portion is pushed and expanded by the annular convex portion at the mountain-shaped portion, and then the elastic restoring force of the main body portion causes the pipe to be expanded. The retainer tilts or slides toward the insertion hole side,
When the checker is pushed from the temporary fixing position to the insertion completion position, a corner portion of the annular convex portion is pressed by the inclined surface, so that the annular convex portion is curved at the opposed mountain-shaped portion. A connector characterized by being fitted between the surfaces.
The connector according to any one of claims 1 to 3,
The retainer has a C-shaped main body that elastically deforms and expands when the pipe is inserted,
The checker has a pair of retainer holding pieces extending downward from left and right ends of the pressing portion,
When the checker is pushed from the temporary fixing position to the insertion completion position, the pipe is sandwiched from both sides by the retainer holding piece through the main body of the retainer. ,connector.
The connector according to any one of claims 1 to 4,
A connector having a detent mechanism for restricting rotation of the pipe relative to the connector body.
The connector according to claim 1,
The lower surface of the tip of the projecting portion has a planar shape,
On the back side of the annular convex portion of the pipe, a D-cut portion is formed by cutting out a part of the outer peripheral surface of the pipe in the circumferential direction,
When the projecting portion is fitted to the rear side of the annular convex portion, the planar lower surface of the projecting portion and the D-cut portion notched in the planar shape face each other with a predetermined gap. Thus, the connector is restricted from turning around the connector body.
The connector according to claim 6, wherein
The retainer has a C-shaped main body that elastically deforms and expands when the pipe is inserted,
The inner portions of the main body portion facing each other are mountain-shaped portions protruding in the center direction,
When the pipe is inserted into the connector main body from the pipe insertion hole, the main body portion is pushed and expanded by the annular convex portion at the mountain-shaped portion, and then the elastic restoring force of the main body portion causes the pipe to be expanded. The retainer tilts or slides toward the insertion hole side,
When the checker is pushed from the temporary fixing position to the insertion completion position, a corner portion of the annular convex portion is pressed by the inclined surface, so that the annular convex portion is curved at the opposed mountain-shaped portion. A connector characterized by being fitted between the surfaces.
The connector according to claim 6 or 7,
The retainer has a C-shaped main body that elastically deforms and expands when the pipe is inserted,
The checker has a pair of retainer holding pieces extending downward from left and right ends of the pressing portion,
When the checker is pushed from the temporary fixing position to the insertion completion position, the pipe is sandwiched from both sides by the retainer holding piece through the main body of the retainer. ,connector.